Self Assessment software that files for you
Pull your figures from HMRC and your bank, check the maths, and file your SA100 — without the dread or the spreadsheets.
- 31 Jan
- Deadline we keep you ahead of
- SA100–SA110
- Core return + supplements covered
- £100
- Late-filing penalty we help you avoid
Self Assessment means gathering a year of income from half a dozen places, decoding which supplementary pages you need, and hoping the numbers add up before the 31 January deadline. Miss a relief and you overpay; miss a box and you risk a penalty.
AI TaxPilot connects to HMRC and your bank, pre-fills the SA100 and the right supplementary pages, runs the SA110 tax calculation the way HMRC does, flags anything that doesn’t reconcile, and files the return for you — with the IRmark receipt saved as proof.
- Pre-filled return from HMRC + your bank — no re-keying
- Every relief surfaced (pension, Gift Aid, marriage allowance, more)
- Filed to HMRC with a receipt, not a guess
See it in action
A 50 seconds walkthrough of the real journey, end to end.
Connect to HMRC
Sign in once with your Government Gateway. We only ever read what we need to fill your return — you stay in control.
What you get
Identity, employments, income and tax already paid pulled straight from HMRC into your return.
Self-employment and property income categorised from your connected accounts.
Income tax, Class 2 & 4 NIC, student loan and payments on account computed as you go.
SA102, SA103, SA105, SA106, SA108 and SA109 added automatically from your answers.
Higher-rate pension relief, Gift Aid, marriage allowance and more, claimed in the right boxes.
Submit over HMRC’s gateway and keep the IRmark and submission receipt as evidence.
Calculators included
Free with your account, alongside the AI assistant and filing.
Learn the rules
Plain-English, sourced guides behind this solution.
Self Assessment: the complete guide
Who must file, registration and deadlines, payments on account, the supplementary pages, penalties and the 2025-26 allowances.
Making Tax Digital for Income Tax: the complete guide
Who is in scope, the April 2026/2027/2028 timeline, quarterly updates, the Final Declaration and the new penalty regime.
Are you leaving higher-rate pension relief unclaimed?
Relief at source only adds 20% at the pump. Higher and additional-rate taxpayers have to claim the rest — and millions never do.
Frequently asked questions
Can AI TaxPilot file my Self Assessment to HMRC?
Yes — it prepares the SA100 plus any supplementary pages, runs the tax calculation, and submits over HMRC’s gateway, returning the IRmark and submission receipt as proof.
Will it pull my figures from HMRC automatically?
Once you connect your HMRC account it pre-fills your identity, employments, income and the tax you’ve already paid; self-employment and property income come from your connected bank.
Which supplementary pages are supported?
SA102 (employment), SA103 (self-employment), SA105 (property), SA106 (foreign), SA108 (capital gains) and SA109 (residence) — added automatically based on your answers.
Do I need to be an accountant to use it?
No. Every field is in plain English with an info icon, pre-filled where possible and editable, and the live calculation shows your bill update as you go.
File Self Assessment without the dread
Connect HMRC, pre-fill the return, check the maths and file your SA100 — all in one place.
Start freeNo card required.
This guide is general information, not personal tax advice, and reflects the rules we believe to apply as at June 2026 — rates and thresholds change. Always check your own figures against HMRC and consider a qualified adviser before acting. You remain responsible for the accuracy of anything you file.